Hi Sebastian.Fumey's DefArea won't exclude autogen.. but rather will restore it. If the default apron was a grass VTPm2 Layer4 poly, over a forested area with generic tree autogen; when the poly is removed by a BGL produced from DefArea, the underlying forest texture will show, and the generic autogen will return.The autogen problem is not VTP.Dick

Hmm, what things are left then! :)Could VOR/NDB/ILS excludes possibly affect autogen? That would be rather strange, I guess.